*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;

}
html,body{
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}


.mt20 {
    margin-top: 20px;
}

.mt30 {
    margin-top: 30px;
}


.mt50 {
    margin-top: 50px;
}

.ml20{
    margin-left: 20px;
}

.pb50{
    padding-bottom: 50px;
}

.mr20{
    margin-right: 20px;
}
.mr30{
    margin-right: 30px;
}


.flex{
    display: flex;
}

.flex-column {
    flex-direction: column;
}